Dreher, A., Lindmeier, A. & Heinze, A. 2016 Paper presented at Conference of the International Group for the Psychology of Mathematics Education, Szeged, Hungary August 03, 2016 - August 07, 2016. In Csíkos, C., Rausch, A. & Szitányi, J. (eds.): Proceedings of the 40th Conference of the International Group for the Psychology of Mathematics Education PME (p. 219-226).

Niedermeyer, I., van den Ham, A-K. & Heinze, A. 2016 Paper presented at Conference of the International Group for the Psychology of Mathematics Education, Szeged, Hungary August 03, 2016 - August 07, 2016. In Csíkos, C., Rausch, A. & Szitányi, J. (eds.): Proceedings of the 40th Conference of the International Group for the Psychology of Mathematics Education PME (p. 363-370).